Optimization of the preparation of activated carbon from steam activated cornstraw black liquor for phenol removal

Yong Sun, Jing ping Zhang, Fei Guo, Lian Zhang

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)


The activated carbon (AC) was produced from steam activation of cornstraw black liquor. Response surface methodology (RSM) and the central composite design (CCD) were employed for determining optimal adsorbents with maximum phenol removal capacity. The operational parameters such as activation temperature (°C), duration (min) and steam velocity (SV) (L min−1) were chosen as independent variables in CCD. The statistical analysis indicates that the effects of activation temperature, duration, steam flow rate and combined effect of activation temperature and duration are all significant to the phenol removal capacity. The optimal condition for achieving the maximum phenol adsorption capacity is obtained as the followings: carbonization temperature (850 °C), duration (2.1 h) and SV (38 L h−1) with phenol removal capacity reaching 130 mg/g. The BET specific surface area of AC prepared at optimal conditions could reach 800 m2/g.

Original languageEnglish
Pages (from-to)594-602
Number of pages9
JournalAsia-Pacific Journal of Chemical Engineering
Issue number4
Publication statusPublished - 1 Jul 2016


  • activated carbon
  • black liquor
  • CCD
  • corn straw
  • phenol

Cite this